ext/POSIX/POSIX.xs POSIX extension external subroutines
ext/POSIX/t/posix.t See if POSIX works
ext/POSIX/t/sigaction.t See if POSIX::sigaction works
+ext/POSIX/t/waitpid.t See if waitpid works
ext/POSIX/typemap POSIX extension interface types
ext/re/hints/mpeix.pl Hints for re for named architecture
ext/re/Makefile.PL re extension makefile writer